But the real kiss of death was their arrival and documentation (with photos) of the poor & inconsistent cleaning.

** This is part 6 of me documenting my fun and often stressful real estate journeyThe nightmare is finally over.Today I close on my second flip ending what will hopefully be the roughest period of my investing journey.

If they say "No" then ask them to support that with documentation to avoid a boiler plate response. 

There is a cumbersome way to do it on paper forms, but you should not.The only sensible way is to submit your 1099s to the IRS online, however not directly with the IRS.

That would be a allowed but they should be doing more due diligence and requiring a lot more documentation than what an asset based lender would require.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

I scan and upload all receipts, documents as I get them throughout the year.

As a platinum member I also have my own team to contact when looking for advice or help reviewing documents.

(should have documented, dates may not be exact) What made you interested in investing in this type of deal?

As you are partnering with your sister, have a legal document drawn up as to what happens if one of you wants to sell and the other doesn't, how expenses will be split along with money you are putting down, borrowing, profits, etc.